Back to results
US 2021/0259245 A1Published application
Efficient stabilizer in controlling self accelerated decomposition temperature of peroxycarboxylic acid compositions with mineral acids
AssigneeEcolab USA Inc.
InventorsJunzhong Li, David D. McSherry, Richard Staub
Life of this patent
Estimating the term…
Abstract
Highly acidic, stabilized peroxycarboxylic acid compositions are disclosed as having both improved antimicrobial efficacy in comparison to conventional peroxyoctanoic acid and peroxyacetic acid compositions for sanitizing applications, and improved transport and shipping stability. In particular, low odor and low/no VOC compositions having dual functionality as both acid wash and sanitizing compositions are disclosed.
Claims31
1-20. (canceled)
21:
- A method for non-refrigeration transport of a peroxycarboxylic acid composition, comprising:
- stabilizing the peroxycarboxylic acid composition with a stabilizing agent that increases self-accelerating decomposition temperature (SADT) of the peroxycarboxylic acid to form a stabilized peroxycarboxylic acid composition having a SADT of at least about 45° C., wherein the stabilized peroxycarboxylic acid composition comprises (1) a C1-C22 peroxycarboxylic acid;
- (2) a C1-C22 carboxylic acid;
- (3) hydrogen peroxide;
- (4) from about 1 wt-% to about 50 wt-% of a strong acid;
- and (5) the stabilizing agent, wherein the stabilizing agent comprises a picolinic acid or a compound having the following Formula (IA):
- wherein R1 is OH or —NR1aR1b, wherein R1a and R1b are independently hydrogen or (C1-C6)alkyl;
- wherein R2 is OH or —NR2aR2b, wherein R2a and R2b are independently hydrogen or (C1-C6)alkyl;
- wherein each R3 is independently (C1-C6)alkyl, (C2-C6)alkenyl or (C2-C6)alkynyl;
- and n is a number from zero to 3;
- or a salt thereof, or a compound having the following Formula (IB):
- wherein R1 is OH or —NR1aR1b wherein R1a and R1b are independently hydrogen or (C1-C6)alkyl;
- wherein R2 is OH or —NR2aR2b, wherein R2a and R2b are independently hydrogen or (C1-C6)alkyl;
- wherein each R3 is independently (C1-C6)alkyl, (C2-C6)alkenyl or (C2-C6)alkynyl;
- and n is a number from zero to 3;
- or a salt thereof;
- and
- transporting the stabilized peroxycarboxylic acid composition, wherein the transporting does not require refrigeration and the SADT provides for an exemption from U.S. Department of Transportation (DOT) UN 5.2 classification and allows for the transporting of the stabilized peroxycarboxylic acid composition according to reduced risk DOT UN 5.1 classification.
15 more elements
22:
- The method of claim 21, wherein transporting comprises transporting the stabilized peroxycarboxylic acid composition under ambient conditions.
23:
- The method of claim 21, wherein the stabilized peroxycarboxylic acid composition is transported in bulk at a volume of 300 gallons or more.
24:
- The method of claim 21, wherein the stabilized peroxycarboxylic acid composition is transported in bulk at a volume of 1000 gallons or more.
25:
- The method of claim 21, wherein the C1-C22 peroxycarboxylic acid comprises from about 0.1 wt-% to about 40 wt-%, the C1-C22 carboxylic acid comprises from about 0.1 wt-% to about 90 wt-%, the hydrogen peroxide comprises from about 1 wt-% to about 90 wt-%, and the stabilizing agent comprises from about 0.001 wt-% to about 25 wt-%.
26:
- The method of claim 21, wherein the stabilized peroxycarboxylic acid composition further comprises at least one additional agent comprising an anionic surfactant, a hydrotrope, a defoaming agent, a solvent, a fluorescent active agent, or combinations thereof.
27:
- The method of claim 26, wherein the additional agent is a hydrotrope that aids in solubilization of the stabilizing agent.
28:
- The method of claim 21, wherein the strong acid comprises sulfuric acid, phosphoric acid, methane sulfonic acid, or combinations thereof.
29:
- The method of claim 21, wherein the C1-C22 peroxycarboxylic acid is a C2-C20 peroxycarboxylic acid comprising peroxyacetic acid, peroxyoctanoic acid, peroxysulfonated oleic acid, or combinations thereof, wherein the C1-C22 carboxylic acid is a C2-C20 carboxylic acid comprising acetic acid, octanoic acid, sulfonated oleic acid, or combinations thereof, and wherein the stabilizing agent is a picolinic acid, or a salt thereof.
30:
- The method of claim 21, wherein the stabilizing agent is 2,6-pyridinedicarboxylic acid, or a salt thereof.
31:
- The method of claim 21, wherein the stabilized peroxycarboxylic acid composition has a use solution pH below about 4.
32:
- The method of claim 21, wherein the composition further comprises 1-hydroxyethylidene-1, 1-diphosphonic acid (HEDP).
33:
- The method of claim 24, wherein the SADT of the stabilized peroxycarboxylic acid composition is at least about 50° C., at least about 55° C., at least about 60° C., at least about 65° C., or at least about 70° C.
34:
- The method of claim 21, wherein the stabilized peroxycarboxylic acid composition is transported in a plastic tote or tank.
35:
- The method of claim 23, wherein the stabilized peroxycarboxylic acid composition is transported in a plastic tote or tank.
36:
- The method of claim 21, wherein the SADT is determined according to one of H1, H2, or H4 heat accumulation storage test recommended by the United Nations Committee for Transportation of Dangerous Goods, Model Regulations (Rev. 17).
37:
- A method for non-refrigeration storage of a peroxycarboxylic acid composition, comprising:
- stabilizing the peroxycarboxylic acid composition with a stabilizing agent that increases self-accelerating decomposition temperature (SADT) of the peroxycarboxylic acid to form a stabilized peroxycarboxylic acid composition having a SADT of at least about 45° C., wherein the stabilized peroxycarboxylic acid composition comprises (1) a C1-C22 peroxycarboxylic acid;
- (2) a C1-C22 carboxylic acid;
- (3) hydrogen peroxide;
- (4) from about 1 wt-% to about 50 wt-% of a strong acid;
- and (5) the stabilizing agent, wherein the stabilizing agent comprises a picolinic acid or a compound having the following Formula (IA):
- wherein R1 is OH or —NR1aR1b, wherein R1a and R1b are independently hydrogen or (C1-C6)alkyl;
- wherein R2 is OH or —NR2aR2b, wherein R2a and R2b are independently hydrogen or (C1-C6)alkyl;
- wherein each R3 is independently (C1-C6)alkyl, (C2-C6)alkenyl or (C2-C6)alkynyl;
- and n is a number from zero to 3;
- or a salt thereof, or a compound having the following Formula (IB):
- wherein R1 is OH or —NR1aR1b, wherein R1a and R1b are independently hydrogen or (C1-C6)alkyl;
- wherein R2 is OH or —NR2aR2b, wherein R2a and R2b are independently hydrogen or (C1-C6)alkyl;
- wherein each R3 is independently (C1-C6)alkyl, (C2-C6)alkenyl or (C2-C6)alkynyl;
- and n is a number from zero to 3;
- or a salt thereof;
- and
- storing the stabilized peroxycarboxylic acid composition, wherein the storing does not require refrigeration and is under ambient conditions.
15 more elements
38:
- The method of claim 37, wherein the stabilized peroxycarboxylic acid composition is stored in bulk at a volume of 300 gallons or more.
39:
- The method of claim 37, wherein the C1-C22 peroxycarboxylic acid comprises from about 0.1 wt-% to about 40 wt-%, the C1-C22 carboxylic acid comprises from about 0.1 wt-% to about 90 wt-%, the hydrogen peroxide comprises from about 1 wt-% to about 90 wt-%, and the stabilizing agent comprises from about 0.001 wt-% to about 25 wt-%.
40:
- The method of claim 37, wherein the stabilized peroxycarboxylic acid composition further comprises at least one additional agent comprising an anionic surfactant, a hydrotrope, a defoaming agent, a solvent, a fluorescent active agent, or combinations thereof.
41:
- The method of claim 40, wherein the additional agent is a hydrotrope that aids in solubilization of the stabilizing agent.
42:
- The method of claim 37, wherein the strong acid comprises sulfuric acid, phosphoric acid, methane sulfonic acid, or combinations thereof.
43:
- The method of claim 37, wherein the C1-C22 peroxycarboxylic acid is a C2-C20 peroxycarboxylic acid comprising peroxyacetic acid, peroxyoctanoic acid, peroxysulfonated oleic acid, or combinations thereof, wherein the C1-C22 carboxylic acid is a C2-C20 carboxylic acid comprising acetic acid, octanoic acid, sulfonated oleic acid, or combinations thereof, and wherein the stabilizing agent is a picolinic acid, or a salt thereof.
44:
- The method of claim 37, wherein the stabilizing agent is 2,6-pyridinedicarboxylic acid, or a salt thereof.
45:
- The method of claim 37, wherein the stabilized peroxycarboxylic acid composition has a use solution pH below about 4.
46:
- The method of claim 37, wherein the composition further comprises 1-hydroxyethylidene-1, 1-diphosphonic acid (HEDP).
47:
- The method of claim 38, wherein the SADT of the stabilized peroxycarboxylic acid composition is at least about 50° C., at least about 55° C., at least about 60° C., at least about 65° C., or at least about 70° C.
48:
- The method of claim 37, wherein the stabilized peroxycarboxylic acid composition is stored in a plastic tote or tank.
49:
- The method of claim 38, wherein the stabilized peroxycarboxylic acid composition is stored in a plastic tote or tank.
50:
- The method of claim 37, wherein the SADT is determined according to one of H1, H2, or H4 heat accumulation storage test recommended by the United Nations Committee for Transportation of Dangerous Goods, Model Regulations (Rev. 17).